1 /* Definitions for SH running Linux-based GNU systems using ELF 2 Copyright (C) 1999-2019 Free Software Foundation, Inc. 3 Contributed by Kazumoto Kojima <kkojima@rr.iij4u.or.jp> 4 5 This file is part of GCC. 6 7 GCC is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3, or (at your option) 10 any later version. 11 12 GCC is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with GCC; see the file COPYING3. If not see 19 <http://www.gnu.org/licenses/>. */ 20 21 /* Run-time Target Specification. */ 22 23 /* Enable DWARF 2 exceptions. */ 24 #undef DWARF2_UNWIND_INFO 25 #define DWARF2_UNWIND_INFO 1 26 27 #undef SUBTARGET_CPP_SPEC 28 #define SUBTARGET_CPP_SPEC "\ 29 %{posix:-D_POSIX_SOURCE} \ 30 %{pthread:-D_REENTRANT -D_PTHREADS} \ 31 " 32 33 #define TARGET_OS_CPP_BUILTINS() \ 34 do \ 35 { \ 36 GNU_USER_TARGET_OS_CPP_BUILTINS(); \ 37 } \ 38 while (0) 39 40 #undef TARGET_DEFAULT 41 #define TARGET_DEFAULT \ 42 (TARGET_CPU_DEFAULT | TARGET_ENDIAN_DEFAULT | TARGET_OPT_DEFAULT) 43 44 #define TARGET_ASM_FILE_END file_end_indicate_exec_stack 45 46 #if TARGET_ENDIAN_DEFAULT == MASK_LITTLE_ENDIAN 47 #define MUSL_DYNAMIC_LINKER_E "%{mb:eb}" 48 #else 49 #define MUSL_DYNAMIC_LINKER_E "%{!ml:eb}" 50 #endif 51 52 #if TARGET_CPU_DEFAULT & (MASK_HARD_SH2A_DOUBLE | MASK_SH4) 53 /* "-nofpu" if any nofpu option is specified. */ 54 #define MUSL_DYNAMIC_LINKER_FP \ 55 "%{m1|m2|m2a-nofpu|m3|m4-nofpu|m4-100-nofpu|m4-200-nofpu|m4-300-nofpu|" \ 56 "m4-340|m4-400|m4-500|m4al:-nofpu}" 57 #else 58 /* "-nofpu" if none of the hard fpu options are specified. */ 59 #define MUSL_DYNAMIC_LINKER_FP "%{m2a|m4|m4-100|m4-200|m4-300|m4a:;:-nofpu}" 60 #endif 61 62 #undef MUSL_DYNAMIC_LINKER 63 #define MUSL_DYNAMIC_LINKER \ 64 "/lib/ld-musl-sh" MUSL_DYNAMIC_LINKER_E MUSL_DYNAMIC_LINKER_FP \ 65 "%{mfdpic:-fdpic}.so.1" 66 67 #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2" 68 69 #undef SUBTARGET_LINK_EMUL_SUFFIX 70 #define SUBTARGET_LINK_EMUL_SUFFIX "%{mfdpic:_fd;:_linux}" 71 72 #undef SUBTARGET_LINK_SPEC 73 #define SUBTARGET_LINK_SPEC \ 74 "%{shared:-shared} \ 75 %{!static: \ 76 %{rdynamic:-export-dynamic} \ 77 -dynamic-linker " GNU_USER_DYNAMIC_LINKER "} \ 78 %{static:-static}" 79 80 /* Output assembler code to STREAM to call the profiler. */ 81 #undef FUNCTION_PROFILER 82 #define FUNCTION_PROFILER(STREAM,LABELNO) \ 83 do { \ 84 if (flag_pic) \ 85 { \ 86 fprintf (STREAM, "\tmov.l\t3f,r1\n"); \ 87 fprintf (STREAM, "\tmova\t3f,r0\n"); \ 88 fprintf (STREAM, "\tadd\tr1,r0\n"); \ 89 fprintf (STREAM, "\tmov.l\t1f,r1\n"); \ 90 fprintf (STREAM, "\tmov.l\t@(r0,r1),r1\n"); \ 91 } \ 92 else \ 93 fprintf (STREAM, "\tmov.l\t1f,r1\n"); \ 94 fprintf (STREAM, "\tsts.l\tpr,@-r15\n"); \ 95 fprintf (STREAM, "\tmova\t2f,r0\n"); \ 96 fprintf (STREAM, "\tjmp\t@r1\n"); \ 97 fprintf (STREAM, "\tlds\tr0,pr\n"); \ 98 fprintf (STREAM, "\t.align\t2\n"); \ 99 if (flag_pic) \ 100 { \ 101 fprintf (STREAM, "1:\t.long\tmcount@GOT\n"); \ 102 fprintf (STREAM, "3:\t.long\t_GLOBAL_OFFSET_TABLE_\n"); \ 103 } \ 104 else \ 105 fprintf (STREAM, "1:\t.long\tmcount\n"); \ 106 fprintf (STREAM, "2:\tlds.l\t@r15+,pr\n"); \ 107 } while (0) 108 109 /* For SH3 and SH4, we use a slot of the unwind frame which correspond 110 to a fake register number 16 as a placeholder for the return address 111 in MD_FALLBACK_FRAME_STATE_FOR and its content will be read with 112 _Unwind_GetGR which uses dwarf_reg_size_table to get the size of 113 the register. So the entry of dwarf_reg_size_table corresponding to 114 this slot must be set. To do this, we redefine DBX_REGISTER_NUMBER 115 so as to return itself for 16. */ 116 #undef DBX_REGISTER_NUMBER 117 #define DBX_REGISTER_NUMBER(REGNO) \ 118 (((REGNO) == 16) ? 16 : SH_DBX_REGISTER_NUMBER (REGNO)) 119 120 /* Install the __sync libcalls. */ 121 #undef TARGET_INIT_LIBFUNCS 122 #define TARGET_INIT_LIBFUNCS sh_init_sync_libfuncs 123 124 #undef SUBTARGET_OVERRIDE_OPTIONS 125 #define SUBTARGET_OVERRIDE_OPTIONS \ 126 do \ 127 { \ 128 /* Set default atomic model if it hasn't been specified. */ \ 129 if (global_options_set.x_sh_atomic_model_str == 0) \ 130 { \ 131 if (TARGET_SH3) \ 132 sh_atomic_model_str = "soft-gusa"; \ 133 else if (TARGET_SH1) \ 134 sh_atomic_model_str = "soft-imask"; \ 135 } \ 136 /* Set -musermode if it hasn't been specified. */ \ 137 if (global_options_set.x_TARGET_USERMODE == 0) \ 138 TARGET_USERMODE = true; \ 139 } \ 140 while (0) 141